We regularly visit the Everbody Votes channel on the Wii where they put up opinion polls which you answer and you can view the results about a week later. It's also good way to get Adam to read. So the magic question which resulted in the politically divided map was:

Do you wear perfume / cologne?

Where 'yes' got pink and 'no' got green. So I guess all those redneck (I mean conservative) states are all doused in perfume as well! I love to make funny generalizations about political preference and totally unrelated attributes, but this one takes the cake!